Coiling machine



March 7, 1939. G. M. PRI-:N'rlcE COILING MACHINE 2 Sheets-Sheet l fFiled June 6, 1938 March 7, 1939. M PRENTCE 2,149,941

COILING MACHINE Filed June 6, 1938 2 Sheets-Sheet 2 ATTORNEY.

Patented Mar. 7, 1939 UNITED STATES COILING MACHINE George M. Prentice,Holyoke, Mass., assignor to White & Wyckoff Mfg. Co., Holyoke, Mass., acorporation of Massachusetts Application June 6, 193e, serial No.212,147

Claims.

This invention relates to improvements in coiling machines and theprincipal objects of the invention are directed to the provision of amachine for making coils from wire or the like which is simple in formso as to be economical to manufacture and occupy but small space,compact in arrangement, and which is adapted to operate efficiently athigh speeds.

Various novel features and advantages of this invention will be had fromthe following description of the present preferred form thereof,reference being had to the accompanying drawings, wherein:

Fig. 1 is a front elevational view of a coiling machine embodying thenovel features of the invention;

Fig. 2 is an enlarged sectional elevational view through the coactingperipheral edges of the feed rolls of the machine shown in Fig. 1;

Fig. 3 is a sectional elevational View on the line 2-2 of Fig. 1;

Fig. 4 is an enlarged sectional plan View showing the mandrel on which acoil is formed;

Fig. 5 is an end elevational view of the machine shown in Fig. 1;

Fig. 6 is a sectional elevational view on the line 6--6 of Fig. 1; and

Fig. 7 is a small scale wiring diagram.

Referring now to the drawings more in detail the invention will be fullydescribed.

The machine preferably has forward and rear walls 4 and 6 and a lowerwall 8. Means for driving the machine may consist of a motor I0 having ashaft I2 connected as by a coupling |4 to a drive shaft I6.

The shaft I6 is rotatable in one or more bearings such as I8 and a lowerfeed roll shaft 20 which is rotatable in the side walls 4 and 6 carriesa worm wheel 22 in mesh with a worm 24 on the shaft I6. An upper shaft26 is rotatable in a box 28 that is slidable up and down in the frame 4as shown in Fig. 1 and the said box 28 is spring pressed upwardly bymeans of a spring 30. The shafts 20 and 26 carry intermeshing gearswhereby the upper shaft 26 is driven from the lower one 2|).

On the forward ends of the shafts 26 and 26 there are coacting feedrolls 34 and 36 which have one or more peripheral grooves such as 38 andd shown in Fig. 2. A lever 42 pivoted at 44 for swinging movements ispivotally connected at its end, as shown, to a link 46. The link 46 hasits lower end pivotally connected at 48 to the upper end 50 of a movablemember of a solenoid 52. An adjusting bolt or screw 54 is carried by thelever 42 and is arranged to abut the upper side of the box 28. As thesolenoid is energized to draw the movable member thereof downwardthemember 54 thereof acts on the boX 28 to depress it against the action ofthe spring 30.

Material to be coiled which may be wire ls fed into the grooves of thefeed rolls and when the solenoid is energized to bring about depressingof the box or bearing 28, the rolls 34 and S6 are in feeding relationand feed the wire forwardly between guides 56 and 58 which are providedwith guiding grooves 60 and 62. When current is out off from thesolenoid the spring 80 urges the box 28 upwardly so that the feed rollsno longer act to feed the wire.

A member 64 forwardly of the guides 56 and 58 receives the end part 66of a mandrel 68 and the said part 66 is provided with a spiral grooveinto which wire is fed from the guides. The feed rolls feed the wirethrough the guides and into the spiral groove and as the wire is fedonto the mandrel it is caused to pass into and around the mandrel andemerges from the mandrel in the form of a coil C (see Fig. 4).

A finger member l0 extends upwardly from a screw l2 associated with ablock 'I4 and the upper end of the member I0 overlies an extension I6 ofthe mandrel. A member 'I8 associated with screw 'i2 is provided and byrotation thereof screw 12 and finger member 'I0 are moved in and out orin such a manner that the upper end of the finger is moved back'andforth or longitudinally of the extension '|6. The convolutions of thecoil are controlled by the finger which according to the inventiondetermines the pitch of the coil.

A cutter 80 is sli-dable vertically in a block 82. A spring 84 has itsupper end secured to a member 86 of the cutter and its lower end issecured to a pin 88 movable in a slot 90 of the block 82 to urge thecutter upwardly. A lever 92 is pivoted at 98 to a bracket 96 secured tothe rear wall 6 and has its outer end 98 arranged to bear on the upperend of the cutter 80. An extension 'i6 of the mandrel has an edge part|00 with which the cutter 80 cooperates in a downward stroke to cut offa coil.

A solenoid |02 has a movable part |04 pivotally connected to the lowerend of a link |06. The upper end of said link is pivotally connected toa lever 92 by a member |08 as shown in Fig. 5.

As the solenoid |02 is energized to cause the movable member thereof tomove downwardly the lever 92 is moved through the link |06 so that thecutter 80 is depressed. A cone pulley I I0 has a shaft ||2 rotatablymounted in suitable bearings of the side walls and a sprocket ||4 ofsaid shaft ||2 is connected by a chain II 6 to a sprocket ||8 on shaft20 whereby shaft 2 is driven from shaft 20.

Another or second cone pulley |22 has a shaft ly the lever 42 isactuated in such a way that |24 joui-nailed similarly to the shaft I|2and a shiftable belt |26 operatively engages the cone pulleys. A shifter|30 extending upwardly at opposite sides of the belt |26 is guided insome suitable manner as by a guide |32 for movements back and forthlongitudinally and between the cone pulleys. A screw shaft 534 issuitably journalled in the walls 4 and 6 for rotation and is in threadedengagement with the shifter |30. A manually engageable member |36forwardly of wall 4 is secured to the shaft |32. As the member |36 isrotated i-n one direction vor the other it rotates shaft |34 so that theshifter is moved back and forth to shift the belt along the pulleys forthus varying the relative speeds of the cone pulleys |22 and H0.

At the end'of cone pulley |22 as in Fig. 6 there are disc like members|40 and |42. The former has a sectionof insulation in its peripheryindicated Aby |44. The disc |42 has a projection or contact member |46.Contacts |48 and |50 are carried by a block of insulation |52 and arearranged for contacting with the periphery of member |40 and with theVprojection |46 as the cone pulley |22 rotates. Disc |40 and contact |48are in contacting relation during the revolution of the cone pulley |22,and are in la circuit including solenoid |52 which actuates the feedingaction of the feed rolls. The projection |46 and contact |50 arearranged so they come into contact when it is desired that the cutter 80be moved-downwardly. v

By shifting the belt associated with the cone pulleys the time duringwhich feed rolls are in feeding relation may be varied and in that wayit is possible to vary the length of the coil being wound. Y

The insulating member |44 of disc |40 is disposed with reference to theprojection |46 in such a manner that when the feed rolls are innon-feeding relation as when an insulating block is in engagement withcontact |48 the projec- Vtion |46 contacts with the contact |50 so thatthe cutter operates to cut off a coil while the feeding ofthe Wire isstopped, Thus the amount of wire is vfed bythe feed rolls to form a coilof the desired length, then the feeding of the Wire is stopped andthecutter operates to cut .off the coil formed.

The solenoids are connected. to the contacts according to one form ofthe invention in the following manner, see Fig. '7. The current sup-*ply is represented by lines |60 which are conv| 10 are provided for theleads to the motor l0 and the solenoids 52 and |02 so that the circuitsfor the motor and said solenoids are independently operative.

While I have described the invention in great detail and with respect tothe present preferred form thereof, it is not ldesired to be limitedtheretion, a pair of feed rolls for feeding a wire, a coiling means forreceiving said wire from said feed rolls and forming same into a coil, ameans for cutting off successive coils, a means for controlling theoperation of said feed rolls, and a means controlling the operation ofsaid cutting off means, all adapted and arranged whereby said Ycuttingoff means. operates when a coil of predetermined length has been formed.

2. A coiling machine comprising in combination, a pair of feed rollsrelatively movable between feeding and non-feeding relation, means tomove said rolls into feeding relation, means for receiving Wire from thefeed rolls and forming a coil therefrom,.a movable cutter for cuttingoff a coil, -meansfto actuate the same, the said means for moving saidfeed rolls and the said actuating means including separate solenoids,circuits for said solenoids, and variable circuit closingY and openingmeans in said circuits operatively connected to one of said feed rolls.

3. A coiling machine comprising in combination, a pair of feed rollsrelatively movable betweenV feeding and `non-feeding relation, means tomovesaid rolls into feeding relation, means for receiving wire from thefeed rolls and formving a coil therefrom, a movable cutter for cuttingoff a coil, means to actuate the same, the said `means for moving saidfeed rolls and the said actuating means including separate sole- 5noids, circuits for said solenoids, variable circuit closing and openingmeans in said circuits operatively connected to one of said feed rolls,the said closing means including relatively rotatable cone membersoperatively connected vby a belt shiftable therealong, rotatable contactmembers carried by one of said cones and contact members for engagingthe same.

"4. A coiling machine comprising in combination, a pair of feed rollsrelatively movable towards one another into feeding relation and out offeeding relation, means to move said rolls into feeding relationvincluding a solenoid, meansy to Vreceive wirefrom'said'feed Yrolls andform a coil therefrom,a'cutter reciprocable between cut. a

tingy andnon-'cutting positions to cut off a formed coil; means to movesaid cutter to cutting position including a solenoid, variable speedrotatable members including means to vary the relative speeds thereof,driving connections between one of Vsaidfrotatable members and one ofsaid feed rolls, .contact members carried by the other of said rotatablemembers,Y contact members engageable by .thefirst named. members, and.circuits including said .solenoids members.

5. Armachine for forming wire into a coil comprising in combination, apair of feed rolls relativelyA movable between` feeding and non-feedingrelation, means to move and maintain said rolls in feeding relation forfeeding wire, means for receiving wire from said feed rolls and forminga coil therefrom, a movable cutter for cutting off successive coils,means to actuate the same,

the said means'for moving said feed rolls into` feeding relation and theactuating means including separate lelectrically operated units,circuits for said units, variable circuit control means in said circuitsfor opening and closing the same, and operative connections-.betweensaid control means and one of said feed rolls,

GEORGEM. PRENTICE.

and contact;

lil

